EP2938656B1 - Molecularly imprinted polymers of sol-gel type and their use as antidandruff agent - Google Patents

Molecularly imprinted polymers of sol-gel type and their use as antidandruff agent Download PDF

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EP2938656B1
EP2938656B1 EP13821474.7A EP13821474A EP2938656B1 EP 2938656 B1 EP2938656 B1 EP 2938656B1 EP 13821474 A EP13821474 A EP 13821474A EP 2938656 B1 EP2938656 B1 EP 2938656B1
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group
silane
acid
alkyl
fatty acid
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French (fr)
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EP2938656A1 (en
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Andrew Greaves
Christèle Ribaud
Franco Manfre
Karsten Haupt
Jeanne Bernadette Tse Sum Bui
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LOreal SA
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LOreal SA
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
    • A61K8/89—Polysiloxanes
    • A61K8/896—Polysiloxanes containing atoms other than silicon, carbon, oxygen and hydrogen, e.g. dimethicone copolyol phosphate
    • A61K8/898—Polysiloxanes containing atoms other than silicon, carbon, oxygen and hydrogen, e.g. dimethicone copolyol phosphate containing nitrogen, e.g. amodimethicone, trimethyl silyl amodimethicone or dimethicone propyl PG-betaine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
    • A61K8/361—Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/58—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing atoms other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur or phosphorus
    • A61K8/585—Organosilicon compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P17/00—Drugs for dermatological disorders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00—Preparations for care of the hair
    • A61Q5/006—Antidandruff preparations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00—Preparations for care of the hair
    • A61Q5/02—Preparations for cleaning the hair
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
    • C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/32—Post-polymerisation treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/54—Silicon-containing compounds
    • C08K5/541—Silicon-containing compounds containing oxygen
    • C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond

Definitions

  • a subject matter of the invention is specific molecularly imprinted polymers of sol-gel type and also a cosmetic composition comprising them, and their use for eliminating or reducing dandruff of the scalp.
  • dandruff corresponding to a desquamative disorder of the scalp, is disagreeable both aesthetically and because of the annoyance which it causes (itching, redness, and the like), so that many people confronted with this problem to variable degrees wish to be rid of it efficiently and permanently.
  • Dandruff corresponds to an excessive and visible desquamation of the scalp resulting from excessively rapid multiplication of the epidermal cells.
  • This phenomenon can be caused in particular by microtraumas of physical or chemical nature, such as excessively aggressive hair treatments, extreme climatic conditions, nervousness, diet, fatigue or pollution, but it has been demonstrated that dandruff conditions usually result from a disorder of the microflora of the scalp and more particularly from the excessive colonization of a yeast which belongs to the family of yeasts of the Malassezia genus (previously known as Pityrosporum ovale) and which is naturally present on the scalp.
  • antifungal agents used for their antifungal action, of zinc pyrithione, piroctone olamine or selenium disulfide.
  • antidandruff agents used for their antifungal action, of zinc pyrithione, piroctone olamine or selenium disulfide.
  • these specific molecularly imprinted polymers make it possible to trap the oleic acid present on the scalp and thus to prevent the colonization of the scalp by Malassezia microorganisms. They thus make it possible to reduce or prevent the appearance of dandruff.
  • a subject matter of the present invention is thus a molecularly imprinted polymer capable of being obtained according to a process comprising a first stage of polymerization of a mixture comprising:
  • Another subject matter of the invention is a process for the preparation of molecularly imprinted polymer as defined above.
  • Another subject matter of the invention is a cosmetic composition
  • a cosmetic composition comprising, in a physiologically acceptable medium, a molecularly imprinted polymer as defined above.
  • Another subject matter of the invention is a cosmetic method for preventing and/or treating dandruff of the scalp, in particular that caused by yeasts of the Malassezia genus, characterized in that it comprises the application, to the scalp, of an imprinted polymer as defined above or of a cosmetic composition comprising it.
  • Another subject matter of the invention is the cosmetic use of imprinted polymer as defined above as active agent for preventing and/or treating dandruff of the scalp.
  • Molecularly imprinted polymers or MIPs are materials which are widely used for their applications in the fields of biotechnology, chemistry, chromatography, analytical chemistry and biology ( J. Mol. Recognit., 19, 106-180 (2006 ); Molecularly Imprinted Materials: Science and Technology, Marcel Dekker, NY, M. Yan and O. Ramstrom (2005 )).
  • the concept of molecular imprinting relates to Emil Fisher's famous "lock and key fit" principle known since 1894 for enzymes with their ligand ( Advances in Carbohydrate Chemistry and Biochemistry, 1-20 (1994 )).
  • Molecular imprinting consists more specifically in producing a polymer which comprises specific cavities in the shape and size of a target molecule or "imprint", also known as template, which serves as gage for the formation of recognition sites exhibiting a complementarity in shape with the imprinted molecule.
  • Molecular imprints are polymers prepared from functional monomers polymerized around a molecule, also known as “template”. The monomer is thus chosen so as to develop noncovalent interactions (hydrogen bond, electrostatic, ionic interactions, and nonionic, indeed even of low energy, such as Van der Waals bonds, or ⁇ - ⁇ stacking) with the template.
  • the polymerization will subsequently be carried out in a "porogenic" solvent between the monomers complexed with the template and a crosslinking agent, so as to form specific cavities.
  • the bonds between the template and the polymerized monomers are subsequently broken by means of suitable solvents to extract the template from the polymer support.
  • the extraction of the template molecule then leaves vacant recognition sites with a high affinity for the target molecule.
  • the shape and the size of the imprint and also the spatial arrangement of the functional groups inside the recognition cavity are complementary to the template molecule and include sites of specific interactions with this same molecule.
  • the polymerization method used to manufacture the molecularly imprinted polymers according to the invention is the sol-gel polymerization process.
  • the sol-gel process makes it possible to manufacture an inorganic polymer by simple chemical reactions known to a person skilled in the art (see, for example, Kirk-Othmer Encyclopedia of Chemical Technology, " Sol-Gel Technology", A. C. Pierre, placed online on 07/13/2007, DOI: 10.1002/0471238961.19151208051403.a01.pub2; http://onlinelibrary.wiley.com/doi/10.1002/0471238961.19151208051403.a01.pub2/pdf , and Ullmann's Encyclopedia of Industrial Chemistry, " Aerogels", N. Hüsing and U.
  • the molecularly imprinted polymer is prepared from the silane of following formula (I): R 1 Si(OR 2 ) z (R 3 ) x (I) in which:
  • R 2 represents an alkyl group comprising from 1 to 4 carbon atoms.
  • R 2 represents a linear alkyl group comprising from 1 to 4 carbon atoms.
  • R 2 represents the ethyl group.
  • R 3 represents an alkyl group comprising from 1 to 4 carbon atoms.
  • R 3 represents a linear alkyl group comprising from 1 to 4 carbon atoms.
  • R 3 represents the methyl or ethyl group.
  • R 1 is an acyclic chain.
  • R 1 is a saturated linear C 1 -C 6 hydrocarbon chain substituted by an amine NH 2 group. More preferably, R 1 is a saturated linear C 2 -C 4 hydrocarbon chain substituted by an amine NH 2 group.
  • R 1 is a saturated linear C 1 -C 6 hydrocarbon chain substituted by an amine NH 2 group
  • R 2 represents an alkyl group comprising from 1 to 4 carbon atoms
  • R 3 represents an alkyl group comprising from 1 to 4 carbon atoms.
  • z is equal to 3.
  • the silane of formula (I) is chosen from 3-aminopropyltriethoxysilane (APTES), 2-aminoethyltriethoxysilane (AETES), 3-aminopropylmethyldiethoxysilane, N-(2-aminoethyl)-3-aminopropyltriethoxysilane, 3-(m-aminophenoxy)propyltrimethoxysilane, p-aminophenyltrimethoxysilane or N-(2-aminoethylaminomethyl)phenethyltrimethoxysilane.
  • APTES 3-aminopropyltriethoxysilane
  • AETES 2-aminoethyltriethoxysilane
  • 3-aminopropylmethyldiethoxysilane N-(2-aminoethyl)-3-aminopropyltriethoxysilane
  • the silane (I) is chosen from 3-aminopropyltriethoxysilane (APTES), 2-aminoethyltriethoxysilane (AETES), 3-aminopropylmethyldiethoxysilane or N-(2-aminoethyl)-3-aminopropyltriethoxysilane.
  • the silane (I) is 3-aminopropyltriethoxysilane (APTES).
  • the sol-gel polymerization is carried out in the presence of a crosslinking agent chosen from tetra(C 1 -C 4 )alkyl orthosilicates.
  • the crosslinking agent can be chosen from tetraethoxysilane (TEOS) or tetramethoxysilane (TMOS).
  • TEOS tetraethoxysilane
  • TMOS tetramethoxysilane
  • the crosslinking agent is tetraethoxysilane (TEOS).
  • the sol-gel polymerization is carried out in the presence of water in order to bring about the hydrolysis of the silane (I) and then its condensation.
  • the polymerization can be carried out in the presence of an acid catalyst, in particular in order to accelerate the condensation reaction, such as, for example, inorganic acids, such as hydrochloric acid, or organic acids, such as acetic acid.
  • the polymerization can be carried out in the presence of a basic catalyst, such as, for example, aqueous ammonia.
  • a basic catalyst such as, for example, aqueous ammonia.
  • This polymer is carried out according to chemical reactions known to a person skilled in the art which are triggered when the reactants are brought into contact with water and optionally with a catalyst which has the effect 1) of hydrolyzing the alkoxy (OR 2 ) groups of the silanes to give hydroxyl groups and then 2) of condensing the hydrolyzed products to result 3) in the polymerization of the system.
  • the process for the preparation of the molecularly imprinted polymers is advantageously carried out at a temperature of between 20 and 150°C inclusively.
  • the C 14 -C 20 fatty acid, the silane (I) and the crosslinking agent tetra(C 1 -C 4 )alkyl orthosilicate are employed according to a C 14 -C 20 fatty acid/silane (I)/tetra(C 1 -C 4 )alkyl orthosilicate molar ratio ranging from 1/[1 to 20]/[1 to 40], preferably ranging from 1/[1 to 10]/[1 to 30] and preferentially ranging from 1/[1 to 5]/[1 to 5].
  • the molecularly imprinted sol-gel polymers are prepared from a porogenic solvent which preferably has a polarity which makes it possible i) to dissolve the C 14 -C 20 fatty acid imprint molecule and/or ii) which is suitable for the interaction of said C 14 -C 20 fatty acid imprint molecule with the molecularly imprinted polymer.
  • Porogenic solvent is understood to mean a solvent capable of creating a porous network able to convey the C 14 -C 20 fatty acid molecules as far as the imprints of the polymer.
  • the porogenic solvent should also promote the C 14 -C 20 fatty acid imprint molecule/monomer interactions and the stability of the complex formed.
  • the porogenic solvent when the dissolution of the imprint molecule in the prepolymerization mixture demands it, is chosen from polar protic organic solvents, such as water or C 1 -C 8 alcohols, such as ethanol.
  • the porogenic solvent is a polar aprotic solvent, such as acetonitrile, tetrahydrofuran (THF), dialkylformamides (dimethylformamide, diethylformamide), N-methyl-2-pyrrolidinone (NMP), N-ethyl-2-pyrrolidinone (NEP), N,N'-dimethylpropyleneurea (DMPU) and dimethyl sulfoxide (DMSO).
  • THF tetrahydrofuran
  • NMP N-methyl-2-pyrrolidinone
  • NEP N-ethyl-2-pyrrolidinone
  • DMPU N,N'-dimethylpropyleneurea
  • DMSO dimethyl sulfoxide
  • the porogenic solvent used according to the invention is a solvent chosen from polar (a)protic solvents, such as water, C 1 -C 8 alcohols, such as ethanol, and acetonitrile, and their mixtures.
  • polar (a)protic solvents such as water, C 1 -C 8 alcohols, such as ethanol, and acetonitrile, and their mixtures.
  • the aim of the invention is to make available a molecularly imprinted polymer which captures saturated or unsaturated fatty C 14 -C 20 carboxylic acids, in particular oleic acid, at the surface of the scalp.
  • the fatty C 14 -C 20 carboxylic acids "template” is a compound which mimics oleic acid, which causes dandruff, within the molecularly imprinted polymer in order for the molecularly imprinted polymer subsequently to be able to capture oleic acid when it is applied to the scalp.
  • fatty C 14 -C 20 carboxylic acid of myristic acid (C14:0), myristoleic acid (C14:1), pentadecanoic acid (C15:0), palmitic acid (C16:0), palmitoleic acid (C16:1), sapienic acid (C16:1), heptadecanoic acid (or margaric acid) (C17:0), stearic acid (C18:0), oleic acid (C18:1), arachidic acid (C20:0) or eicosenoic acid (C20:1).
  • the fatty acid is oleic acid.
  • the process for the preparation of the imprinted polymer according to the invention comprises:
  • the withdrawal stage is carried out by washing the polymer obtained in the first stage with a washing solvent.
  • the washing solvent can be chosen from C 1 -C 4 alcohols, water, acetonitrile, tetrahydrofuran (THF), dialkylformamides (dimethylformamide, diethylformamide), N-methyl-2-pyrrolidinone (NMP), N-ethyl-2-pyrrolidinone (NEP), N,N'-dimethylpropyleneurea (DMPU), dimethyl sulfoxide (DMSO), chloroform, acetic acid, aqueous ammonia, diethylamine, and their mixtures.
  • the imprinted polymer no longer comprises the C 14 -C 20 fatty acid.
  • the empty imprints thus make it possible for the polymer to be able to capture oleic acid when it is applied to the scalp.
  • the characterization of the MIP consists in demonstrating the formation of the imprints and in evaluating their number and their affinity for the targeted molecule. These results can be complemented by a study of the morphology of the material (size and shape of the particles, porosity and specific surface). These methods are known to a person skilled in the art (see, for example, point 1.7, p. 49, of the June 2010 doctoral thesis of R. Walsh, Development and Characterization of MIP http://repository.wit.ie/1619/1/Development and characterisation of molecularly imprinted suspension polymers.pdf)
  • the cosmetic composition according to the invention comprises the molecularly imprinted polymer as described above and a physiologically acceptable medium.
  • physiologically acceptable medium is understood to mean a medium compatible with cutaneous tissues, such as the skin and the scalp.
  • the molecularly imprinted polymer according to the invention can be present in the cosmetic composition in a content ranging from 0.1% to 20% by weight, preferably ranging from 0.1% to 10% by weight and preferentially ranging from 0.1% to 5% by weight, with respect to the total weight of the composition.
  • the physiologically acceptable medium of the composition can be more particularly composed of water and optionally of a physiologically acceptable organic solvent chosen, for example, from lower alcohols comprising from 2 to 8 carbon atoms and in particular from 2 to 6 carbon atoms, such as ethanol, isopropanol, propanol or butanol, polyethylene glycols having from 6 to 80 ethylene oxide units, and polyols, such as propylene glycol, isoprene glycol, butylene glycol, glycerol and sorbitol.
  • a physiologically acceptable organic solvent chosen, for example, from lower alcohols comprising from 2 to 8 carbon atoms and in particular from 2 to 6 carbon atoms, such as ethanol, isopropanol, propanol or butanol, polyethylene glycols having from 6 to 80 ethylene oxide units, and polyols, such as propylene glycol, isoprene glycol, butylene glycol, glycerol and sorbitol.
  • compositions according to the invention can be provided in all the formulation forms conventionally used for a topical application and in particular in the form of aqueous or aqueous/alcoholic solutions, of oil-in-water (O/W), water-in-oil (W/O) or multiple (triple: W/O/W or O/W/O) emulsions, of aqueous gels or of dispersions of a fatty phase in an aqueous phase using spherules, it being possible for these spherules to be polymeric nanoparticles, such as nanospheres and nanocapsules, or lipid vesicles of ionic and/or nonionic type (liposomes, niosomes or oleosomes). These compositions are prepared according to the usual methods.
  • compositions used according to the invention can be more or less fluid and can have the appearance of a white or colored cream, an ointment, a milk, a lotion, a serum, a paste, a mousse or a shampoo.
  • composition used according to the invention comprise adjuvants commonly employed in the cosmetics field and chosen in particular from water, oils, waxes, pigments, fillers, dyes, surfactants, emulsifiers, cosmetic active agents, UV-screening agents, polymers, thickeners, film-forming polymers, preservatives, fragrances, bactericides, odor absorbers or antioxidants.
  • adjuvants commonly employed in the cosmetics field and chosen in particular from water, oils, waxes, pigments, fillers, dyes, surfactants, emulsifiers, cosmetic active agents, UV-screening agents, polymers, thickeners, film-forming polymers, preservatives, fragrances, bactericides, odor absorbers or antioxidants.
  • composition according to the invention can comprise an additional antidandruff active agent chosen in particular from ellagic acid and its ethers, salts of ellagic acid and its ethers, pyrithione salts, 1-hydroxy-2-pyridone derivatives and selenium (poly)sulfides, and also their mixtures.
  • an additional antidandruff active agent chosen in particular from ellagic acid and its ethers, salts of ellagic acid and its ethers, pyrithione salts, 1-hydroxy-2-pyridone derivatives and selenium (poly)sulfides, and also their mixtures.
  • Ellagic acid or 2,3,7,8-tetrahydroxy[1]benzopyrano[5,4,3-cde][1]benzopyran-5,10-dione, is a well-known molecule which is present in the plant kingdom. Reference may be made to the publication of the Merck Index, 20th edition (1996), No. 3588. Ellagic acid exhibits the following chemical formula: which comprises four fused rings.
  • the ellagic acid ether(s) which can be used according to the invention are preferably chosen from the mono-, di-, tri- or polyethers obtained by etherification of one or more hydroxyl groups (one of the four OH groups of ellagic acid) of ellagic acid to give one or more OR groups, R being chosen from C 2 -C 20 alkyl groups, polyoxyalkylene groups and in particular polyoxyethylene and/or polyoxypropylene groups, and groups derived from one or more mono- or polysaccharides, such as, for example, the group of following formula:
  • the R groups as defined above can be identical or different.
  • these ethers of ellagic acid are chosen from 3,4-di-O-methyl ellagic acid, 3,3',4-tri-O-methyl ellagic acid and 3,3'-di-O-methyl ellagic acid.
  • the salt(s) of ellagic acid and/or of its ethers which can be used according to the invention are preferably chosen from alkali metal or alkaline earth metal salts, such as the sodium, potassium, calcium and magnesium salt, the ammonium salt and the salts of amines, such as triethanolamine, monoethanolamine, arginine and lysine salts.
  • the salt(s) of ellagic acid and/or of its ethers which can be used according to the invention are chosen from alkali metal or alkaline earth metal salts, in particular the sodium, potassium, calcium or magnesium salts.
  • Pyrithione is the compound 1-hydroxy-2(1H)-pyridinethione or 2-pyridinethiol 1-oxide.
  • the pyrithione salts capable of being used in the context of the invention are in particular the monovalent metal salts and the divalent metal salts, such as the sodium, calcium, magnesium, barium, strontium, zinc, cadmium, tin and zirconium salts.
  • the divalent metal salts and in particular the zinc salt (zinc pyrithione) are particularly preferred.
  • the 1-hydroxy-2-pyridone derivatives are preferably chosen from the compounds of formula (A1) or their salts: in which:
  • those which are particularly preferred consist of 1-hydroxy-4-methyl-6-(2,4,4-trimethylpentyl)-2(1H)-pyridone and 6-cyclohexyl-1-hydroxy-4-methyl-2(1 H)-pyridone.
  • Mention may be made, among the salts which can be used, of the salts of lower (C 1 -C 4 ) alkanolamines, such as ethanolamine and diethanolamine, amine or alkylamine salts, and also the salts with inorganic cations, such as ammonium salts and the salts of alkali metals or alkaline earth metals.
  • Selenium disulfide is provided in the form of a powder, the particles of which generally have a particle size of less than 200 ⁇ m and preferably of less than 25 ⁇ m.
  • the antidandruff agent is chosen from ellagic acid, zinc pyrithione, piroctone olamine and selenium disulfide, and also their mixture.
  • the additional antidandruff active agents can be present in the composition according to the invention in a proportion of from 0.001% to 30% by weight and preferably in a proportion of from 0.5% to 25% by weight, with respect to the total weight of the composition.
  • Example 1 (invention) and Example 2 (outside the invention):
  • Example 1 The reactants and solvents were mixed in a beaker and then stirred at 60°C overnight. The reaction mixture was filtered and the precipitate was dried in an oven at 100°C overnight. After polymerization and attainment of the polymer impregnated with oleic acid, the impregnated polymer was washed 3 times with a 0.1 M ammonium hydroxide solution at 60°C and twice with methanol. Subsequently, the imprinted polymer, thus emptied of oleic acid, was dried under vacuum overnight. An oleic acid-imprinted polymer (MIP ex. 1) was obtained in the form of opaque white spherical particles. The mean diameter of the particles obtained is 1081 nm (determined by diffraction light scattering (DLS)).
  • DLS diffraction light scattering
  • Example 2 The same synthesis was carried out in the absence of the template (oleic acid) in order to prepare a non-imprinted polymer (NIP). This acts as reference (non-selective polymer). An opaque white polymer was obtained in the form of spherical particles. The mean diameter of the particles obtained is 1261 nm.
  • An oleic acid-imprinted polymer (MIP ex. 3) and an imprint-free polymer (NIP ex. 4) were obtained in the form of opaque white spherical particles.
  • the mean diameters of the particles are 332 nm (example 3) and 296 nm (example 4).
  • the polymers obtained in the examples described above were suspended in a 5/55/40 (mixture by volume) propylene glycol/ethanol/water solution. Increasing concentrations of polymers were introduced into 2 ml polypropylene tubes, and [ 3 H]-oleic acid (0.45 nM, 15 nanoCuries) was added. The final volume was adjusted to 1 ml. The tubes were incubated overnight at ambient temperature on a rotary shaker. They were subsequently centrifuged at 16 000 g for 15 min and a 500 ⁇ l aliquot of the supernatant was withdrawn and transferred into a scintillation vial containing 3 ml of liquid scintillant (reference 327123 from Fluka).
  • the amount of free radioligand was assayed by a scintillation counter (Beckman LS-6000 IC). This amount was compared with that of the solution of the [ 3 H]-oleic acid before it is brought into contact with the polymers. The difference makes it possible to evaluate the amount of [ 3 H]-oleic acid adsorbed.
  • Figure 1A shows the variation in the amount of oleic acid adsorbed as a function of the concentration of polymer (MIP of example 1; NIP of example 2).
  • Figure 1 B shows the change in the amount of oleic acid adsorbed as a function of the concentration of polymer (MIP of example 3; NIP of example 4).
  • Example 8 Recognition at the surface of the stratum corneum
  • the treated samples of stratum corneum were left in a closed petri dish for 3 hours and then washed twice with a propylene glycol/ethanol/water 5/55/40 solution (two times 2 ml) and then twice with a 5% by weight aqueous sodium lauryl sulfate solution (two times 1.5 ml). Subsequently, the pieces of stratum corneum were completely digested by Soluene®-350 solutions (1 ml, purchased from Sigma-Aldrich). Digestion took place at 40°C for 1.5 hours. The solutions obtained were added to scintillation solutions (5 ml, reference 327123 from Sigma-Aldrich) and the radioactivity was measured in a scintillation counter. Digestion is necessary in order to prevent interactions between the stratum corneum and the radiolabelled oleic acid, which can reduce the radioactivity measured.
  • results obtained are interpreted in the following way: The higher the number of disintegrations per minute detected by the scintillation counter, the greater the radioactivity of the solution. A measured number of disintegrations per minute close to that of the control is interpreted as corresponding to no inhibition of the diffusion of the oleic acid in the stratum corneum. In this case, the oleic acid is not trapped by the polymer.
  • a measured number of disintegrations per minute which is lower than that of the control is interpreted as a reduction in the diffusion of the oleic acid in the stratum corneum: it reflects the trapping of the oleic acid at the surface of the stratum corneum by the MIP.
  • sample No. 1 (the control) should have the highest radioactivity.
  • the NIP (sample No. 3) should not trap/inhibit the diffusion of the oleic acid in the skin and should thus have a figure close to or identical to sample No. 1.
  • the MIP (sample No. 2) should have the least radioactivity as it was designed to trap the oleic acid.
  • An antidandruff shampoo is prepared which comprises the following ingredients: Sodium lauryl ether sulfate (2.2 OE) as an aqueous solution 17 g AM (Texapon AOS 225 UP from Cognis) Coco-betaine as an aqueous solution (Dehyton AB 30 from Cognis) 2.5 g AM Coconut acid monoisopropanolamide (Rewomid V 3203 from Goldschmidt) 2.0 g Molecularly imprinted polymer of example 1 1 g AM Preservatives 1.1 g Fragrance 0.5 Water q.s. for 100 g
  • the shampoo applied to the hair and the scalp, makes it possible to alleviate the appearance of dandruff.
  • An antidandruff lotion is prepared which comprises the following ingredients:
  • the lotion applied to the hair and the scalp, makes it possible to alleviate the appearance of dandruff.

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  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
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EP13821474.7A 2012-12-26 2013-12-20 Molecularly imprinted polymers of sol-gel type and their use as antidandruff agent Active EP2938656B1 (en)

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FR1262784A FR2999920B1 (fr) 2012-12-26 2012-12-26 Polymeres a empreinte moleculaire de type solgel et leur utilisation comme agent antipelliculaire
US201361773185P 2013-03-06 2013-03-06
PCT/EP2013/077790 WO2014102209A1 (en) 2012-12-26 2013-12-20 Molecularly imprinted polymers of sol-gel type and their use as antidandruff agent

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FR3000074B1 (fr) 2012-12-26 2015-01-16 Oreal Polymeres a empreinte moleculaire et leur utilisation comme agent antipelliculaire
FR2999917B1 (fr) 2012-12-26 2017-06-23 Oreal Polymere a empreinte moleculaire pour pieger selectivement les molecules odorantes
FR2999918B1 (fr) 2012-12-26 2015-06-19 Oreal Polymere de type sol-gel a empreinte moleculaire pour pieger selectivement les molecules odorantes
DE102013203484A1 (de) * 2013-03-01 2014-09-04 Henkel Ag & Co. Kgaa Farbschützende Waschmittel
US10768157B2 (en) 2015-10-20 2020-09-08 The Florida International University Board Of Trustees Materials and methods for the detection of trace amounts of substances in biological and environmental samples
US9772338B2 (en) * 2015-10-20 2017-09-26 The Florida International University Board Of Trustees Materials and methods for the detection of trace amounts of substances in biological and environmental samples
CN110183663B (zh) * 2019-05-14 2022-07-19 浙江工业大学 一种芍药苷分子印迹聚合物及其制备与应用
CN115368619B (zh) * 2022-08-09 2023-09-26 上海理工大学 一种分子印迹荧光传感器及其制备与应用

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US6057377A (en) * 1998-10-30 2000-05-02 Sandia Corporation Molecular receptors in metal oxide sol-gel materials prepared via molecular imprinting
US6649212B2 (en) * 2001-07-30 2003-11-18 Guardian Industries Corporation Modified silicon-based UV absorbers useful in crosslinkable polysiloxane coatings via sol-gel polymerization
CN1252037C (zh) * 2003-03-21 2006-04-19 清华大学 利用分子印迹法对神经酰胺进行分离纯化的方法
DE102004046179A1 (de) * 2004-09-23 2006-03-30 Wacker Chemie Ag Vernetzbare Massen auf der Basis von Organosiliciumverbindungen
EP2066406A2 (de) * 2006-09-19 2009-06-10 Basf Se Kosmetische zubereitungen auf basis molekular geprägter polymere
KR101520107B1 (ko) * 2006-12-17 2015-05-13 가부시키가이샤 브리지스톤 혼성 중합체 및 제조방법
US8679859B2 (en) * 2007-03-12 2014-03-25 State of Oregon by and through the State Board of Higher Education on behalf of Porland State University Method for functionalizing materials and devices comprising such materials
FR2930438B1 (fr) * 2008-04-25 2012-09-21 Oreal Composition cosmetique comprenant au moins un compose organique du silicium, au moins un tensioactif cationique et au moins un acide organique, et un procede de traitement cosmetique mettant en oeuvre ladite composition
FR2941621B1 (fr) * 2009-01-30 2011-04-01 Oreal Composition cosmetique comprenant un alkoxysilane particulier et une gomme microbienne et utilisations en coiffage
CN101906186B (zh) * 2010-08-11 2012-08-29 天津科技大学 脂肪酸类分子印迹聚合物的制备方法
FR2975593B1 (fr) * 2011-05-27 2013-05-10 Oreal Composition comprenant un alcoxysilane et un amidon modifie et son utilisation en cosmetique
FR2975594B1 (fr) * 2011-05-27 2013-05-10 Oreal Composition comprenant un alcoxysilane, un ester gras et une silicone et son utilisation en cosmetique
CN102585156B (zh) * 2012-02-22 2013-09-11 天津科技大学 一种α-亚麻酸分子印迹聚合物材料的制备方法

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FR2999920B1 (fr) 2015-07-17
ES2602286T3 (es) 2017-02-20
CN104870525A (zh) 2015-08-26
US20190125655A1 (en) 2019-05-02
FR2999920A1 (fr) 2014-06-27
WO2014102209A1 (en) 2014-07-03
US20150342869A1 (en) 2015-12-03
CN104870525B (zh) 2017-09-19
EP2938656A1 (en) 2015-11-04

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